VNX Vespa P125X
Frame VNX1T · 1978–1981 · P-series
Engine
TypeSingle cylinder, air cooled 2-stroke
InductionDisc valve
Bore × stroke52.5 mm × 57 mm
Displacement123.4 cc
Compression ratio8.2 : 1
Power7.5 bhp @ 5,750 rpm
Lubrication2% (USA autolube)
Transmission
Type4 speed constant mesh
1st gear14.47 : 1
2nd gear10.98 : 1
3rd gear7.31 : 1
4th gear5.36 : 1
ClutchWet, multiplate
Carburetor
CarburetorDell'Orto SI 20/20 D
Venturi20 mm
Main jet98/100
Slow-running jet160/100
Mixer tubeBE 3
Atomiser280/100
Starter jet60/100
Throttle valve6823.01
Ignition & Electrical
IgnitionContact breaker & coil
Timing21° BTDC
Breaker gap0.3–0.5 mm
Spark plugNGK - B6HS
Spark plug gap0.6 mm
System12 volt
Wheels & Tires
Wheels10″
Wheel hubsCast w/cooling fins
Tires3.50 × 10
Tire pressure (front)18 psi
Tire pressure (rear, solo)26 psi
Tire pressure (rear, 2-up)36 psi
Performance
Top speed56 mph
Dry weight229 lbs